Pin-joint.



PATENTED MAY 10, 1904.

A. POLLARD.

PIN JOINT.

APPLIOATION FILED JULY 15v 1903.

N0 MODEL.

Mum-5555,

UNITED STATES Patented. May 10, 1904.

PATENT OFFICE.

PIN-JOINT.

SPECIFICATION forming part of Letters Patent No. 759,548, dated May 10, 1904.

Application filed July 15, 1903.

T0 (ti/Z whom it nan/y concern:

Be it known that I, ALBERT POLLARD, a citizen of the United States of America, and a resident of Providence, Rhode Island, have invented certain new and useful Improvements in Pin-Joints, of which the following is a specification.

My invention relates to improvements in pin-joints; and the purpose of my invention is to provide a pin-joint in which the pin will have a bearing upon the outer circumference of the eye as well as upon the inner and also in which the travel of the pin upon its pivot is limited. I accomplish these objects by the device shown in the accompanying drawings, in which Figure 1 is a perspective of my pin-joint attached to a plain brooch; Fig. 2, a plan view of a piece of stock swaged to receive the pin; Fig. 3, the same stock with the superfluous metal trimmed away; Fig. 4, a side view of Fig. 3; Fig. 5, a sectional view through the lineX X of Fig. 2; Fig. 6, a vertical view of the joint with the halves bent up together viewed endwise; Fig. 7, a side view of the same, and Fig. 8 a view showing the pin in position and the limit of its travel by the device hereinafter described.

The same parts are designated by the same letters throughout the various drawings.

In Fig. l, A is the pin-joint, Z) d being the two lugs or sides thereof and (Z the pin.

In Fig. 2, 5 represents the stock of which the joint is made swaged so as to form the annular channels 0 c. The shape of the channels c c conforms to the shape of the eye of the pin, which eye is shown best in Fig. 8.

One important feature of my device is shown by c c and 0 0 in Fig. 2. This feature consists of shoulders formed at the points 0' c and. c a, limiting the swing of the pin both backward and forward.

a c are projecting studs, together constituting a pivot to hold the eye of the pin when the halves of the point are brought together.

Fig. 3 represents the joint with the superfluous metal trimmed off, leaving the studs 0 0 the retaining-walls b b forming a bearing for the external circumference of the eye Serial No. 165,607. (No model.)

of the pin, and having the shoulders 0 c and o c for the purpose above mentioned.

Fig. 4 is a side view of Fig. 3 and shows a channel 7 grooved out from the bottom of the joint to facilitate the bending of the two parts together. In this figure are seen the cross-scctions of the depressions c c, forming the annular bed of the eye of the pin (Z.

Fig. 5 is a cross-seetion of the joint before it is bent together through the lines X X of Fig. 2, a" 0 being the projecting studs which when the two halves of the joint are bent together form the pivot for the eye of the pin.

Fig. 6 is a vertical edge view of the joint with the halves brought together, 0' 0 being the shoulders limiting the throw of the pin, 5 b the retaining-walls, forminga bearing for the outside of the eye of the pin, and c a circular cross-section of the space for the eye of the pin.

Fig. 7 is a vertical front view of the joint, showing in dotted lines the stud c, the annular space 0 for the eye of the pin, and the shoulders 0 c limiting the throw of the pin.

Fig. 8 shows the pin CZ in position, one-half the joint being cut away. The shoulder 0 0f the joint is such as not to permit the pin to come down to a position parallel with the brooch, but leaves it just above a parallel position, so that it has to be sprung down into the eye of the brooch. This is shown best in Fig. 1. limit of the backward swing of the pin, the pin when in its farthest backward position being practically at right angles to the face of the brooch, thus facilitating the attachment of the pin to a garment. The shoulders c 0 thus enable the pin to be more easily attached and also serve to hold the pin in position more securely after it has once been fastened.

The most important element of my invention is the annular space between the studs 0 and the outer walls 5' b of the joint, said space being of circular cross-section. By means of this method of manufacturing joints the joint is in substance nearly twice as strong as the ordinary pin-joint and would be serviceable and useful even without any pivot or stud c", the outer retai11ing-walls alone being suflicient The dotted lines (Z, Fig. 8, show the to hold the pin in place; but with the studs 0 c the joint is greatly strengthened and the pin moves more easily and steadily and is held in position more securely.

Having now described my invention, what I claim, and desire to secure by Letters Patent,

1. In a pin-joint a blank provided at opposite sides of its middle with pivot-forming studs, and having annular grooves concentric with the studs; whereby when the blank is bent upon itself the studs will registen and form a pivot and the grooves will form a circular inclosing channel.

2. A pin-j oint comprising parallel walls having registering pivot studs on their inner faces for the eye of a pin and an annular groove concentric with the studs to form a circular bearing for the exterior of the pineye.

3. A pin-joint comprising parallel walls lying face to face and having registering annular grooves on their inner faces, and registering pivot-studs in the center of said grooves, the said walls being cut away with the said grooves for a certain distance to allow a Working space for the pin.

Signed at Pawtucket this 13th day of July, 1903.

ALBERT POLLARD.

Witnesses:

RoscoE M. DEXTER, FLORENCE E. BATES. 

